... ) Dia:2.45mm; 2) Hardness:3B; 3) Length:185mm; 4) Certification:EN71-3, ASTM F963-08, ST2002-3 Product Graphite Pencil LeadMaterial GraphiteGrade Standard ... DIY service for your order4,tested by R.s.oH-3, EN71-3,ASTM963-085,non-toxic, environmental friendly lead6,used for ...